SUUNTO X9_en. - Manual (Page 99)

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radio communications. There is no guarantee that interference will not occur in a
particular instance. If this equipment does cause harmful interference to other
equipment, try to correct the problem by relocating the equipment.
Consult an authorized Suunto dealer or other qualified service technician if you cannot
correct the problem. Operation is subject to the following conditions:
(1) This device cannot cause harmful interference.
(2) This device must accept any interference received, including interference that may
cause undesired operation.
Repairs should be made by authorized Suunto service personnel. Unauthorized
repairs will void warranty.